At the same feed, the conversion of grafting ay-PCL17 dropped to ca. 80%.
Similarly, maximum Cr2O3 recovery of 46.73% can be achieved at the same feed rate, feed pulp density of 10% solids by wt. and 16 cm of splitter position.
It was also found that HA rejection increased with higher pH at the same feed conductivity of around 60 μS cm−1.
As the conversion increases at the same feed composition, the CCD becomes broader towards the low-macromonomer-content side, which is in contrast to the CCDs of the samples obtained previously from ω-methacryloyl polystyrene macromonomer.
By coupling separation by membrane and the reaction in the same device, the conversion obtained at the same feed rate and catalyst loading was higher than that achieved without any membrane.
Both co-current and counter-current operating modes are investigated and the simulation results are compared with corresponding predictions for an industrial adiabatic fixed bed reactor operated at the same feed conditions.
A permeate flux of 22.4 kg/m2 h and a NaCl rejection of 99.9% were attained during the VMD process at the same feed temperature and a downstream pressure of 31.5 kPa.
As the acrylic acid concentration increased in the co-substrate feed, at the same feed rate (μ = 0.25 h-1), the accumulation of MCL-PHA increased as well as the proportion of HN monomers from 65 mol% (no acrylic acid) to greater than 92 mol% (at NA: G: AA = 1.25: 1: 0.05) (Table 1).
Comparison between PVSA and PTSA, at the same feed characteristics, same packed columns and adsorption operating conditions, revealed that the PVSA process, with less cycle time than PTSA, could achieve the same product purity with 94.8% recovery and 3.90 [mol/kg day] productivity, whereas PTSA has the recovery of 74.04% and productivity of 2.79 [mol/kg day].
As a consequence, the reaction and separation functions could be coupled very efficiently, and the conversion obtained at the same feed rate and catalyst loading was greater than in conventional fixed bed reactors, or in reactors where the zeolite membrane was kept separated from the catalyst.
